public class Circular{
    Circle bottom;
    double height;
    void setBottom(Circle c){
        bottom=c;
    }
    void setHeight(double h){
        height=h;
    }
    double getVolme(){
        if(bottom==null)
            return -1;
        else
            return bottom.getArea()*height/3.0;
    }
    double getBottomRadius(){
        return bottom.getRadius();
    }
    public void setBottomRadius(double r){
        bottom.setRadius(r);
    }
}
